powershell search entire forest for duplicate user custom attribute

I have a user custom attribute in the forest, need to search for duplicate using powershell
josephtipoAsked:
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Chris DentPowerShell DeveloperCommented:
An enhancement (in my opinion)...
$Users | Group-Object ExtensionAttribute10 | Where-Object { $_.Count -gt 1 }

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That'll leave you with access to everything you got out of AD via the Group property.

I strongly advise you limit the property set though, in-memory comparison using either of the methods above is going to hit it hard if you have even a moderate sized directory.

There are other ways so do yell if either Justin's or this suggestion isn't sufficient.

Chris

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